Metal-working apparatus



S. W. HAYES METAL-WORKING APPARATUS Nov. 24, 1953 Original Filed Dec. 28, 1943 5 Sheets-Sheet l Nov. 24, 1953 s. w. HAYES METAL-WORKING APPARATUS Original Filed Dec. 28, 1943 5 Sheets-s 2 NOV. 24, s w HAYES METAL-WORKING APPARATUS 5 Sheets-Sheet 3 Original Filed Dec. 28, 1945 Nov, 24, 1953 s. w. HAYES 2,660,128

METAL-WORKING APPARATUS Original Filed Dec. 28, 1943 5 Sheets-Sheet 4 ail/416 M- NOV. 24, 1953 s w. HAYES METAL-WORKING APPARATUS 5 Sheets-Sheet 5 Original Filed Dec. 28, 1943 Patented Nov. 24, 1953 UNITED STATES PATENT OFFICE METAL-WORKING APPARATUS Stanley W. Hayes, Richmond, Ind., assignor to Hayes Track Appliance Company, Richmond, Ind., a corporation of Indiana Original application December 28, 1943, Serial No.

515,937, now Patent No. 2,481,421, dated September 6, 1949. Divided and this application April 27, 1949, Serial No. 89,840

track on the work. Machines of this character are not adapted for cutting plates other than big ones, whereas an advantage of the apparatus of the present invention is that it can be used to cut up small pieces, such as scrap, whenever straight line cuts are desired.

Pantograph machines have sometimes been used but these have the disadvantage that it is necessary manually to guide the tracing wheel. As compared with machines of this character, the apparatus of the present invention is simpler to construct and easier to operateeven when made of sufiicient length to out long straight lines, it will not have unwieldly dimensions as would the pantograph machine.

An object of the present invention is to provide a metal work cutting apparatus incorporating new and improved cooperating track and carriage structures.

Another object is to provide a metal working apparatus utilizing a track structure comprising a pair of cylindrical members secured to a base support.

Another object is to provide a metal working apparatus utilizing a track structure comprising a pair of cylindrical members secured to a base support so that the horizontal upper and lower and vertical portions of the cylindrical members are exposed.

Another object is to provide a new and improved supporting means for a movable carriage.

Another object is to produce a new and improved means for movably holding and guiding the carriage on its supporting means or track.

A further object is to provide a new and improved adjustment means for the carriage to adjust it to its supporting means or track.

And still another object is to prcvidea new and improved carriage and track for a metal working apparatus so that the overhanging weight of the torch and associated boom or arm will not upset the carriage.

Other objects and advantages will become apparent from the following description taken in conjunction with the accompanying drawings:

Fig. 1 is a general perspective view of the apparatus of the present invention viewed from the front and one end;

Fig. 2 is a plan view of the apparatus;

Fig. 3 is a front view of the apparatus;

Fig. 4 is an enlarged cross-sectional view taken substantially along the line 4-4 of Fig. 3 and illustrating the movable carriage mainly in elevation (but omitting details of the driving means on the opposite side of the carriage for clarity) Fig. 5 is an enlarged plan view of the carriage showing details of construction and a fragment of the carriage supporting means;

Fig. 6 is an elevational view of the rear of the carriage and is taken substantially along the line 66 of Fig. 5;

Fig. 7 is a fragmentary cross-sectional view showing one adjustment means and is taken substantially along the line 'l-'l of Fig. 6;

Fig. 8 is a cross-sectional detailed view on an enlarged scale of a portion of the carriage supporting and guiding means and is taken substantially along the line 8--8 of Fig. 2 and Fig. 9 is a fragmentary plan View, partly sectional in character, taken along the line 99 of Fig. 8.

Referring now to the drawings, and particularly to Fig. 1, it may be noted that the metal working apparatus of the present invention is a cutting apparatus of the type employing a torch I0 supplied with a combustible medium through the flexible conduits l2 from a tank or .tanks (not shown). The apparatus includes a stationary sup-port I4 and a torch supporting carriage indicated generally by the reference character l6 movably mounted on the support. The torch and carriage supported by it are movable lengthwise of the support by means of a variable speed drive indicated generally by the reference character I8, and including an endless cable 2!! to which the carriage may be clutched by a clutch mechanism, indicated generally by the reference character 22 (Fig. 4).

The stationary support It is primarily characterized by a pair of longitudinal tracks 2%,

preferably made of cold rolled shafting, secured as by welding to the upper outer corners of the upwardly extending flanges 25 of a shipbuilding channel 28 supported in horizontal position upon four legs 30 which are suitably braced to the channel by braces 32. The legs and braces may be welded to each other and to the transverse portion of the channel 28, thereby to provide a simple and sturdy supporting frame for the apparatus. If desired, an H beam could be used in place of the channel 28.

The torch supporting carriage it is movably mounted on the stationary support and. Specifioally upon thev shafting 24, which thus constitute ways for the carriage. In the embodiment of the invention ilulstrated the carriage supports the torch IS, but it should be understood that many of the principles of the present invention may be embodied, in an. apparatus wherein the torch is fixed and the work. is mounted on the carriage for movement with respect to the torch. Furthermore, a plurality of torches can be mounted upon. the. carriage.

The torch IE3 is secured tn a torch support. indicated generally by the reference character. 34; (which may be constructed in accordance with the disclosure of United States Letters Patent- No. 2,317,562, granted April 27, 1943), whereby the torch may be readily secured in various. positions. The torch support is. mounted upon an arm 35 angularly adjustable relative to the movablev carriage. Hi. The angular adjustment is provided by pivotally mounting 2;. lug 38, secured to one end of the arm 35', upon a pair of uprightv ears 48 suitably secured as by welding to the upper side of a generally T-shaped carriage chassis 42. The arm is secured in adjusted position by means of a bolt is. passing through the lug and the upright ears (:Eigs 4 and 6') Referring particularly to Figs. 2 and 3,, endless cable 20, by which the movable carriage is propelled through the variable speed driving means it, is secured: to the frame in suclr manner that the tension thereof may be readily adjusted. The cable 2b is: mounted on a pair of pulleys so and 52 the latter of which is adjust.- able relative to the former and to the stationary support l4. Pulley 553. is fixedly secured. to a drive shaft journaled for rotation in a pair of spaced apart bearings 55-: and 58' suitably secured to the upright flanges 26 of. the channel -28 as: by supporting arms 50' towhich the bearend.- of the shaft E i projecting; beyond the bearing 58. Undesired. endwise movement. of; the shaft is. prevented by collars it secured to its opposite ends.

The adjustable pulley 52 is mounted on a shaft 12 journaled for rotation in a pair of bearings 14. The bearings M are securedas by welding to the upper sides of a pair of uprights 1% secured in turn to a horizontal supporting plate 1'8 adjustably mounted relative tothe stationary support is. The plate 18 is secured to the ends of a pair of relatively long studs 813 movable into adjusted positions relative to the stationary support. The studs 89 extend through pairs of spaced apart transverse lugs 82- secured tothe flanges 26 of the channel 28 and each of the studs is held in adjusted position by a pair of locking. nuts 34' located at opposite. sides. of one of the pairsof lugs 82'. It is thus: a relatively simple matter to place the: required tension on the endless cable 2 It should be noted that if desired the supporting arms 8 for the other pulley 5d might also be adjustable lengthwise of the stationary support.

The cable 20 is preferably a steel cable having its ends spliced and soldered, but it could fixedly secured to the countershaft $8.

4 be a perforated steel ribbon, a link belt chain, or the like.

The variable speed drive of the endless belt includes in addition to the pulleys (i l, 66, and G8 a. number of different dameter pulleys 95, 92 and 3 5 (Fig. 1) nonrotatably mounted upon a movable countershait $5 and driven by an electric motor Hie through a speed reducer H12 and the pulleys Kid and I85, the latter of which is The driving means isL mounted upon a base plate I98 secured tothe stationary support i i by a plurality (three-)0)? downwardly extending supports H0, to the lower ends of which are secured a mounting. plate H2 to which the base plate IE8 is $6- cured by a. plurality of bolts (not shown). The oount'ershaft 55 is, supported on the base plate Hi3 so that it may be angularly adjusted relative thereto. The countershait support is supported by means including a pair of upwardly extending lugs ill), across which extend the shaft H8 pivotally supporting a pair oi arms I23 tothe outer ends. of which are secured a pair of bearings 22 in which the countershaft 96 is journaled for rotation The countershait may bev locked in adjusted positions by arrangemerit including a slotted upwardly extending cured to the base plate I3 2.

plate 124 secured to the base plate Hi8 and. a wing nut lZE secured to one of the countershait support arms i253. In order to add to the rigidity of the countershaft assembly the supporting arms I28 are also interconnected by a cross piece H3.

The three pulleys mounted on the endless belt drive shaft 58 and upon countershaft 9-5 may be: variously interconnected by a belt ltd, illustrated as being of the \l-type. If desired a link belt working on sprockets could. be utilized so as to provide a more positive drive without maintaining' the belts tight. The pulleys Hi l and i536 are; interconnected by a similar V-belt I32 through which the countershaft Bil is driven at a constant speed by the. motor ill- 3 and speed reducer IE2. The. motor may be a 1750 R. P. M.

A H. P.. motor and the speed reducer may have a reduction. of QOO-to 1..

The: motor I08 and. speed reducer I62 are mounted on av separate base plate I3 3 (Fig. 2) secured as by a plurality of bolts .35 to the main base plate M8. The motor and speed reducer are interconnected through a flexible coupling !.3.6., and the speed reducer and pulley Hi l are similarly connected through a flexible coupling I38 (Fig. l) The pulley 164 is journaled for rotation in a relatively long bearing (not shown) mounted upon an upwardly extending lug se- The details of the driving means and its support, not being an integral part of the invention claimed in this application, are more fully illustrated in the aforesaid application, Serial No. 515,937, Patent No. 2,481,421.

The movable carriage it includes a number of novel features insuring an accuracy of movement. It includes the previously referred to generally T-shape chassis 132 having a front portion 53, connected to a rearwardly extending transverse portion 45 and upon which portion 33 the torch carrying arm 35 is adjustably mounted at its junction with the portion 55. To provide the necessary vertical support for horizontal move ment the chassis has secured to it three wheels adapted to bear on the upper surfaces of the tracks 24. Two of the wheels [M are located at that side of. the apparatus whereat the arm 36 and torch to are located, while the third wheel I45 is located at the opposite or rear side. To prevent tipping and to insure accurate movement of the carriage on the track, a pair of wheels I48 is provided to bear against the vertical front surface of the front track 24, a pair of wheels 65!! is located to bear against the rear vertical side of the same track, and a single wheel, 552, is provided to bear against the under side of the rear track as.

The whee-ls may be made in any suitable manner, but it is preferred that each wheel be provided with an inner bronze bushing I54 illustrated in conjunction with the wheel 52 in Fig. 4, and with the wheels I43 and H59 in Fig. 8 so that thewheel may rotate relative to its sup porting shaft or pin, The wheels I 44 are supported by pins I56 extending through a pair of vertically arranged spaced apart lugs E58 between which the wheels are located and which are secured to the front portion of the T-shaped chassis member 2. The pins 256 may be retained in place by suitable means such as cotter pins 51. The wheel its is similarl mounted to the rear end of the portion :35 by a pin Ifiil extending through a pair of vertically arranged spaced apart lugs I82 secured to the portion 45 and between which the wheel I46 is located.

The wheels M8 and I59 are secured to opposite transverse projections tee from the front portion 43 if the T chassis, as best illustrated in Figs. 5, 8 and 9. The wheel E50 is secured to the chassis by a downwardly extending stud ltd having an enlarged central portion between which and a collar I58 the wheel I59 is mounted. The wheel M3 is mounted on the chassis so that its position can be adjusted relative to the way, i. the axis of rotation of the wheel I 43 may be adjusted relative to the axis of the way 24, thereby to insure accurate movement of the carriage. The wheel is mounted upon a stud its having a central enlarged portion H2 between which and a collar Il'd the wheel is rotatably mounted. The stud includes a threaded upper portion I'IS which is offset relative to the intermediate portion, as best illustrated in Figs. 8 and 9, so that upon loosening a nut no the stud may be rotated to vary the position of the roller I48 relative to the way at.

The wheel I52 located. underneath the rear way 2t is mounted upon a stud its similar to the stud 6% but removably attached to a bracket I32 by a nut Ill-l (Figs. 4 and 6). The wheel 552 is adjustable vertically so that accuracy of engagement with the wa 24 is provided. The adjustability provided by the arrangement enabling the depending bracket I82 to be moved vertically to the chassis d2. This arrangement includes enlarged aperture-s tilt near the upper end of the bracket through which extend a pair of studs I88 secured to a small plate l lll rigidly secured to the rear end of the transverse portion d5 of the chassis 42.

It will be observed. from the plan views (Figs. 2 and 5) that the mounting ears it for the torch arm 35 are affixed to the chassis 52 at the junction. of the front portion t3 with the transverse portion 35. It will also be observed that the front portion as is parallel with and extends over the front track or way 2% so that the entire downward component of the weight of the torch, arm and associated mechanism is imposed upon the front track 24 through the wheels M 5. The overturning of the carriage 42 by the overhanging arm 36 and torch It is prevented by the wheel I52 which rides on the bottom horizontal'side of the rear rail 24. Since it is desirable from the standpoint of ease and proper operation that the carriage 42 move straight along the rails or ways 24, the importance of the guiding rollers Ids and I58 can be appreciated, and when the rollers it are properly adjusted the rollers M4 ride on the upper horizontal portion of the tracks or ways 24 and substantially at the upper end of the vertical diameter of the track 24. For the same reason, the rollers H36 and I52 engaging the upper and lower horizontal surfaces of the rear rail on way 24 must be fairly closely aligned and both must engage their respective horizontal portions of the rail without binding. The adjustability of the rollers I48 and I52 is an important feature of the present invention in properly aligning and positioning the chassis so that it rides properly upon the ways without canting to one side or tipping therefrom.

The carriage is adapted selectively to be connected to an endless belt by a clutch mechanism 22 which is best illustrated in Fig. 4, to which reference is now had. The clutch mechanism includes a pair of jaw members 269 and 202 between which the cable Zl! may be gripped. The jaw 206 is fixedly secured to the under side of the chassis member 42 and the jaw 282 is fixedly secured to a pivotally mounted supporting arm 264. The arm 265 is pivotally supported by a structure including a pin 2% and a pair of depending lugs 208 secured to opposite sides of the transverse portions 65 of the chassis member E2. The clutch jaws 2G0 and 292 are preferably made of hardwood and secured by screw bolts (not shown) to the chassis and supporting arm, respectively. The use of wood results in less wear on the cable 20. If desired, only a facing of wood could be used, or fiber or soft metal such as lead could be used.

The clutch is adapted selectively to be clutched and declutched by a pivotally movable earn 258 engageable with the movable jaw mounting met ber 284. The cam is fixedly secured to a shaft 2| 2 pivotally mounted upon a pair of lugs are extending downwardl from and secured to opposite sides of the transverse portion 35. An operating lever 'Zlt is secured to one end of the shaft M2 so that an operator may readily effect the engagement and disengagement of the clutch jaws with the endless cable 26.

In order to stop the carriage when it has been moved in cutting direction to a predetermined point, the carriage is adapted to open a switch 22c controlling energization of the motor lbs. The switch is actually operated by an arm 222 secured to the carriage and projecting downwardly to engage the switch operating lever. Stops 22s are located at opposite ends of the track as a precautionary measure to prevent accidental movement of the carriage from the track when it is moved by hand or power. If the carriage is being moved under power and strikes a stop 22s the clutch 22 slips so that damage is avoided.

From the foregoing detailed description it may be noted that the apparatus may be constructed readily and economically, and while heavy enough to be firm it still is light enough to be moved about easily although this is rarely necessary except for some special job. It can be utilized to cut up large plate as well as scrap and smaller pieces whenever straight line cuts 'are desired. Even when made of a length to make alien-.128

F exce tionally long cuts, the machine will not be of unwieldly dimensions.

The movable carriage is light, and when the clutch is released to release. the. carriage from the cable, the former can be moved baclc and forth with one finger. Not only is the carriage light, but it is accurately guided by the tracks and the rollers in engagement therewith. Furthermore, the construction is such that the rollers may be adjusted to secure accurate movement of the carriage even after wear has taken place.

In making a cut, the carriage is preferably initially located at the right end of the support as seen in Figs. 1 to 3-, in which figures the carriage is shown at an intermediate. position. Assuming that the work has been properly located and the torch It properly adjusted relative to it, then the clutch operating lever M76 is operated to effect engagement of the clutch jaws 296 and 2&2 with the endless cable 29. The motor Hill may or may not be operating at this time. If it is not, the switch 226 is closed as may be some other motor controlling switch such, for example, as a reversing switch (not shown) to place the motor into operation. Thereafter, the carriage H5- is moved at a speed determined by the setting of the belt iiit interconnecting the endless belt driven shaft 5s and the countershaft 95, which it may be remembered is driven at a constant speed through the speed reducer E02.

The movable carriage and torch are moved in a straight line at a speed determined in advance and de endent upon the nature of the cut to be made. After the carriage has been started in motion, it moves until the cut is completed when an operator may deenergize the motor. if de. sired, the work could be so arranged that the cut would be completed and the movement of the carriage automatically terminated by the opening of switch 22% by the arm 222 on the movable carriage. If desired, the switch. could be adjustably mounted so that the carriage movement could be automatically determined at desired points. With the switchv in the indicated position, then if an operator should fail to turn off the motor, the motor will be turned off automatically when the switch is operated by the arm 222. It is a relatively small matter to vary the speed of movement of the carriage. All that is necessary is that the countershaft be loosened by release of the wing nut I26. The belt I36 is thus loosened so that its position on-the sets of variable speed pulleys may be changed.

In order to maintain the desired tension on the endless belt, the position of the pulley may be adjusted byloosening the nuts 86 so that the studs tit may be moved.

The three point rolling support of the mo"- able carriage insures accurate g ding thereof by the horizontal top portions of, the track 2 3. The pairs of rollers M8 and I50 engaging opposite vertical portions of the front track 2Q insure accurate horizontal movement and the rollers its and i5? engaging the top and bottom por tions of the rear track 24 insure accurate vertical movement of the carriage and prevent. its tipping from the tracks due to the Weight and positioning of the overhanging arm 38 and torch It.

While a single embodiment of the invention has been illustrated, it is contemplated that various modifications may be made therein without departing from the principles of the present invention. It should be understood, therefore, that the details of the illustrated embodiment of the; invention are not: to be intended to be limitative of the invention except in so. far as set forth in the accompanying claims.

Having thus described my invention, what I desire to secure by United States Letters Patent is:

1. A metal working apparatus support, including in combination, a longitudinally extending supporting member having a pair of parallel spaced upright portions and a transverse portion interconnecting said upright portions below their upper ends, and a pair of track forming sharting pieces secured to the upper outer corners of said upright portions so as to provide at each side of said longitudinally extending supporting member opposed upper and lower and opposedv inner and outer track defining surfaces on said shafting. pieces adapted to be engaged by the wheels of a carriage, all of said track defining surfaces except-both inner surfaces being positioned to the outside of said supporting member.

2'. A metal working apparatus support, including in combination, a longitudinally extending support member having spaced upright portions and a transverse portion interconnecting said upright portions below their upper ends, said upper ends lying in a common horizontal plane, and cylindrical track defining members secured to the upper outer corners of said upright portions in such positions that the vertical and horizontal longitudinally extending tangential portions of said cylindrical members are exposed to provide track surfaces, spaced apart circumierentially around said cylindrical members by approximately adapted. to be engaged by the wheels of a carriage.

3. A metal working apparatus support, including in combination, a longitudinally extending supporting member having spaced upright portions and :a transverse portion interconnecting said upright portions below their upper ends, and. cylindrical track defining members secured to the upper outer corners of said upright portions, each of said members being secured to said upright portions along a longitudinal line on its surface below and to the inside of its longitudinal axis to provide opposed upper and lower and opposed inner and outer longitudinally extending track defining surfaces adapted to be engaged by the wheels of a carriage.

4. In a metal working apparatus, the combination including, a pair of spaced apart generally horizontally coplanar cylindrical tracks having exposed upper and lower generally horizontal and generally vertical tangential portions, means connected to said tracks to support them in said spaced apart position, a carriage body, means on said carriage body and adapted movably to support a metal workingv means upon and to one side of said carriage body which would tend to tip said carriage body. to one. side and from said tracks, and means mounted on said carriage body for movably supporting said carriage body on said tracks, said last named means including a three-point roller support having fiat tread rollers riding upon the upper horizontal tang ential portions. of said tracks, two of said roller supports being located at the side of said carriage body having said metal working supporting means and the third at the opposite side, and a flat tread roller engaging and riding against the lower horizontal tangential portion of the track, at said opposite side to resist the tipping tendency of the supported metal working means.

5. In a metal working apparatus, the combination including, a pair of spaced apart generally horizontally coplanar cylindrical tracks having exposed upper and lower generally horizontal and generally vertical tangential portions, means connected to said tracks to support them in said spaced apart position, a carriage body, means on said carriage body and adapted movably to support a metal working means upon and to one side of said carriage body which would tend to tip said carriage body to one side and from said tracks, and means mounted on said carriage body for movably supporting said carriage body on said tracks, said last named means including a three-point roller support having flat tread rollers riding upon the upper horizontal tangential portions of said tracks, two of said roller supports being located at the side of said carriage body having said metal Working means supporting means and the third at the opposite side, a flat tread roller engaging and riding against the lower horizontal tangential portion of the track at said opposite side to resist the tipping tendency of the supported metal working means, and two longitudinally spaced apart pairs of flat tread rollers engaging opposite vertical tangential portions of said track at said one side, a pair of said named rollers being located adjacent each of said two roller supports at said one side of said carriage.

6. In a metal working apparatus, the combination including, a pair of spaced apart generally horizontally coplanar cylindrical tracks having exposed upper and lower generally horizontal and generally vertical tangential portions, means connected to said tracks to support them in said spaced apart position, and a carriage comprising a substantially flat T-shaped chassis member having a first portion extending longitudinally of and overlying one of said tracks and a second portion bridging across said tracks so that its outer end overlies the other of said tracks, means on said chassis member and adapted movably to support a metal working means upon and to one side of said chassis member which would tend to tip said carriage to one side and from said tracks, and means mounted on said chassis member for movably supporting said chassis member on said tracks, said last named means including a threepoint roller support having flat tread rollers riding upon the upper horizontal tangential portions of said tracks, two of said roller supports being located at opposite ends of said longitudinally extending chassis member portion and the third at the outer end of said second chassis member portion, a flat tread roller engaging and riding against the lower horizontal tangential portion of said other track and opposed to said third roller to resist the tipping tendency of the supported metal working means, and two longitudinally spaced apart pairs of fiat tread rollers engaging opposite vertical tangential portions of said track at said one side, a pair of said last named rollers being located at each outer end of said longitudinaly extending chassis member portion and adjacent each of said two roller supports.

7. In a metal working apparatus, the combination including, a pair of spaced apart generally horizontally coplanar cylindrical tracks having exposed upper and lower generally horizontal and generally vertical tangential portions, means connected to said tracks to support them in said spaced apart position, and a carriage comprising a substantially flat T-shaped chassis member having a first portion extending longitudinally of and overlying one of said tracks and a transverse portion bridging across said tracks so that its outer end overlies the other of said tracks, a pair of apertured upright ears on said chassis member at the junction of said longitudinal and transverse chassis member portions and adapted movably to support a metal working means upon and to one side of said chassis member which would tend .to tip said carriage to one side and from said tracks, and means mounted on said chassis member for movably supporting said chassis member on said tracks, said last named means including a three-point roller support having flat tread rollers riding upon the upper horizontal tangential portions of said tracks, two of said roller supports being located at opposite ends of said longitudinally extending chassis member portion and the third at the outer end of said transverse chassis member portion, a flat tread roller engaging and riding against the lower horizontal tangential portion of said other track and opposed to said third roller to resist the tipping tendency of the supported metal working means, and two longitudinally spaced apart pairs oi flat tread rollers engaging opposite vertical tangential portions of said track at said one side, a pair of said last named rollers being located at each outer r end of said longitudinally extending chassi mem ber portion and adjacent each of said two roller supports.

STANLEY W. HAYES.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 380,011 'Bac'on Mar. 27, 1888 397,611 Phenix Feb. 12, 1889 671,521 Lang Apr. 9, 1901 944,663 Butler Dec. 28, 1909 1,079,501 Lindemann Nov. 25, 1913 1,149,919 Keinanen Aug. 10, 1915 1,447,895 Schafer Mar. 6, 1923 1,605,521 Drake Nov. 2, 1926 1,612,271 Edson Dec. 28, 1926 1,622,574 Deady Mar. 29, 1927 1,697,356 Hoover Jan. 1, 1929 1,701,013 Ronk Feb. 5, 1929 1,816,031 Willis July 28, 1931 1,973,927 Motley Sept.'18, 1934 1,986,413 Ruemelin Jan. 1, 1935 2,050,147 Anderson Aug. 4, 1936 2,168,986 Harris Aug. 8, 1939 2,182,120 Graham Dec. 5, 1939 2,187,731 Davis Jan. 23, 1940 2,246,502 Bramsen et a1 June 24, 1941 2,253,256 Wehr Aug. 19, 1941 2,253,363 Chandler Aug. 19, 1941 2,270,242 Anderson Jan. 20, 1942 2,318,354 Anjeskey May 4, 1943 2,361,290 Herold Oct. 24, 1944 2,412,598 Brush Dec. 17, 1946 

